Osteosarcopenia was more than twice as common in older patients with RA than in matched controls, and rheumatoid cachexia remained independently associated with osteosarcopenia, supporting osteosarcopenia as a distinct catabolic phenotype in RA.
Osteosarcopenia was more than twice as prevalent in older patients with rheumatoid arthritis compared to age- and sex-matched controls.
Sarcopenia and osteoporosis were each individually more prevalent in RA patients than in controls.
Patients with RA had significantly lower BMI, fat-free mass index, and fat mass index compared to controls.
Rheumatoid cachexia was highly prevalent within the osteosarcopenia subgroup and remained independently associated with osteosarcopenia after multivariable adjustment.
Osteosarcopenia in RA was associated with lower serum albumin levels and greater functional impairment.
The authors characterize osteosarcopenia as a distinct catabolic phenotype in RA, defined by rheumatoid cachexia, lower serum albumin, and greater functional impairment.
This research suggests that older adults with rheumatoid arthritis (RA) face a dramatically higher risk of a condition called osteosarcopenia — the simultaneous loss of both muscle mass and bone density — compared to people of the same age and sex without RA. In this study of 134 RA patients aged 60 and older, nearly 1 in 3 had osteosarcopenia, compared to about 1 in 10 of matched controls. Similarly, sarcopenia (muscle loss alone) and osteoporosis (bone loss alone) were each roughly twice as common in RA patients. The study also found that RA patients overall had lower body weight and lower measures of both fat and muscle mass than controls, even though visceral (abdominal) fat was similar between groups. A key finding was the strong link between osteosarcopenia and a condition called rheumatoid cachexia — a specific pattern in RA where patients lose muscle but retain or gain fat, particularly measured as very low lean mass combined with relatively high fat mass. Nearly 40% of RA patients with osteosarcopenia also had rheumatoid cachexia, and this association held even after accounting for age, other health conditions, and RA-specific disease factors (the adjusted odds ratio was over 10). Patients with osteosarcopenia also had lower blood albumin levels (a marker of nutritional status) and greater difficulty performing everyday tasks like managing finances, cooking, or using transportation. This research suggests that osteosarcopenia in older RA patients is not simply a coincidence of two separate conditions but may represent a distinct biological state driven by chronic inflammation, poor nutrition, and muscle-bone metabolic disruption. Clinicians caring for older adults with RA may benefit from routinely evaluating both muscle and bone health together, alongside nutritional status and functional ability, to identify those at highest risk of physical decline.
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Upload Your LabsOzer F, Sunkak S, Bilgili Z, Şen &, Güven E. (2026). Osteosarcopenia in Older Adults With Rheumatoid Arthritis: Clinical Correlates and Its Association With Rheumatoid Cachexia.. Geriatrics & gerontology international. https://doi.org/10.1111/ggi.70847